I Give Them Experiments And They Respond

To Demonstrate Experimentally That A Microscopic Organism Actually Is The Cause Of A Disease And The Agent Of Contagion, I Know No Other Way, In The Present State Of Science, Than To Subject The Microbe (the New And Happy Term Introduced By M. Sédillot) To The Method Of Cultivation Out Of The Body.

Great Problems Are Now Being Handled, Keeping Every Thinking Man In Suspense; The Unity Or Multiplicity Of Human Races; The Creation Of Man 1,000 Years Or 1,000 Centuries Ago; The Fixity Of Species, Or The Slow And Progressive Transformation Of One Species Into Another; The Eternity Of Matter; The Idea Of A God Unnecessary: Such Are Some Of The Questions That Humanity Discusses Nowadays.

Worship The Spirit Of Criticism. If Reduced To Itself It Is Not An Awakener Of Ideas Or A Stimulant To Great Things, But, Without It, Everything Is Fallible; It Always Has The Last Word.

Are The Atoms Of The Dextroacid (tartaric) Grouped In The Spirals Of A Right-hand Helix Or Situated At The Angles Of An Irregular Tetrahedron, Or Arranged In Such Or Such Particular Unsymmetrical Fashion? We Are Unable To Reply To These Questions. But There Can Be No Reason For Doubting That The Grouping Of The Atoms Has An Unsymmetrical Arrangement With A Non-superimposable Image. It Is Not Less Certain That The Atoms Of The Laevo-acid Realize Precisely An Unsymmetrical Arrangement Of The Inverse Of The Above.

Let Me Tell You The Secret That Has Led Me To My Goal. My Strength Lies Solely In My Tenacity.